-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/20/2014 09:42 AM, Konstantin Khlebnikov wrote: > I'm thinking about limitation for reusing anon_vmas which might > increase performance without breaking asymptotic estimation of > count anon_vma in the worst case. For example this heuristic: allow > to reuse only anon_vma with single direct descendant. It seems > there will be arount up to two times more anon_vmas but > false-aliasing must be much lower. It may even be possible to not create a child anon_vma for the first child a parent forks, but only create a new anon_vma once the parent clones a second child (alive at the same time as the first child). That still takes care of things like apache or sendmail, but would not create infinite anon_vmas for a task that keeps forking itself to infinite depth without calling exec... - -- All rights reversed -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAEBAgAGBQJUbf+hAAoJEM553pKExN6DxhQH/1QL+9GdhaSx7EQnRcbDRcHi GuEfMU0g9Kv4ad+oPSQnH/L7vJMJAYeh5ZJGH+rOykWHp3sGReqDZOnzpXRAe11z 1cSC1BJsndzrv9wX8niFpuKpYbF0IP+ckv3qaEzWtm5yCRyhHVZfr6b794Y4K9jF z2EPPu1vAAldbkx1VlYTwofBA5lESL5UmrFvH4ouI7BeWYSEe6BgVCbvK+K5fANT ketdA5R08xyUAcXDa+28qpBYkdWnxNhwqseDoXCW8SOFNwWbLDI6GRfrsCNku13i Gi41h3uEuIAGDf+AU/GMjiymgwutCOGq+cfZlszELaRvHmDpNGYdPv1llghNg7Q= =Vk+H -----END PGP SIGNATURE----- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>